Account locked, still waiting for unlock 2+ days after talking to CSR

I got an email that said

Your Ally Invest online access is currently disabled because we detected suspicious activity

I wasn't able to get any details about what they considered suspicious. My only guess is that I turned on my VPN and logged in after having logged in without the VPN, even though I've done that many times before.

I do not have access to more than $250,000 that is now completely invisible to me. I can't make transactions, withdraw money, monitor dividends, etc.

Has anybody else dealt with this? How long did it take to get your account unlocked? This combined with the system being offline for maintenance seemingly every weekend has me trying to figure out how to leave Ally without having to sell my shares.